Intel AT80604004872AA User Manual

Intel® Xeon® Processor 7500 Datasheet, Volume 1

167

This location is reserved. Writes to this register have no effect.

This location provides the checksum of the Package Data Section. Writes to this register 
have no effect.

This section provides device traceability. 

This location contains seven ASCII characters reflecting the Intel family number for the 
processor. This number is the same on all of Intel® Xeon® processor 7500 series. 
Combined with the Processor SKU Number below, this is the complete processor part 
number. This information is typically marked on the outside of the processor. If the part 
number is less than 15 total characters, a leading space is inserted into the value. The 
part number should match the information found in the marking specification found in 

. Writes to this register have no effect.

Example: A processor with a part number of AT80604******** will have the following 
data found at offset 38-3Eh: 41h, 54h, 38h, 30h, 36h, 30h, 34h.

15:0

0000h-FFFFh: Reserved

7:0

One-byte checksum of the Package Data Section

00h- FFh: See 

 for calculation of this value.

55:48

ASCII character or 20h

00h-0FFh: ASCII character

47:40

ASCII character or 20h

00h-0FFh: ASCII character

39:32

ASCII character or 20h

00h-0FFh: ASCII character